server/models/Challenge.js

   1 const db = require("../utils/database");
   2 const UserModel = require("./User");
   3
   4 /*
   5  * Structure:
   6  *   id: integer
   7  *   added: datetime
   8  *   uid: user id (int)
   9  *   target: recipient id (optional)
  10  *   vid: variant id (int)
  11  *   randomness: integer in 0..2
  12  *   fen: varchar (optional)
  13  *   cadence: string (3m+2s, 7d ...)
  14  */
  15
  16 const ChallengeModel =
  17 {
  18   checkChallenge: function(c)
  19   {
  20     return (
  21       c.vid.toString().match(/^[0-9]+$/) &&
  22       c.cadence.match(/^[0-9dhms +]+$/) &&
  23       c.randomness.toString().match(/^[0-2]$/) &&
  24       c.fen.match(/^[a-zA-Z0-9, /-]*$/) &&
  25       (!c.to || UserModel.checkNameEmail({name: c.to}))
  26     );
  27   },
  28
  29   create: function(c, cb)
  30   {
  31     db.serialize(function() {
  32       const query =
  33         "INSERT INTO Challenges " +
  34           "(added, uid, " + (c.to ? "target, " : "") +
  35           "vid, randomness, fen, cadence) " +
  36         "VALUES " +
  37           "(" + Date.now() + "," + c.uid + "," + (c.to ? c.to + "," : "") +
  38           c.vid + "," + c.randomness + ",'" + c.fen + "','" + c.cadence + "')";
  39       db.run(query, function(err) {
  40         cb(err, {cid: this.lastID});
  41       });
  42     });
  43   },
  44
  45   // All challenges related to user with ID uid
  46   getByUser: function(uid, cb)
  47   {
  48     db.serialize(function() {
  49       const query =
  50         "SELECT * " +
  51         "FROM Challenges " +
  52         "WHERE target IS NULL" +
  53           " OR uid = " + uid +
  54           " OR target = " + uid;
  55       db.all(query, (err,challenges) => {
  56         cb(err, challenges);
  57       });
  58     });
  59   },
  60
  61   remove: function(id)
  62   {
  63     db.serialize(function() {
  64       const query =
  65         "DELETE FROM Challenges " +
  66         "WHERE id = " + id;
  67       db.run(query);
  68     });
  69   },
  70
  71   safeRemove: function(id, uid)
  72   {
  73     db.serialize(function() {
  74       const query =
  75         "SELECT 1 " +
  76         "FROM Challenges " +
  77         "WHERE id = " + id + " " +
  78           // Condition: I'm the sender or the target
  79           "AND (uid = " + uid + " OR target = " + uid + ")";
  80       db.get(query, (err,chall) => {
  81         if (!err && chall)
  82           ChallengeModel.remove(id);
  83       });
  84     });
  85   },
  86 }
  87
  88 module.exports = ChallengeModel;